Terraformer une sortie complexe à partir d'une ressource avec des blocs dynamiques

J'ai une ressource comme celle-ci :

resource "yandex_mdb_mysql_cluster" "main" {
      + allow_regeneration_host = false
      + created_at              = (known after apply)
      + description             = "Multi node MySQL cluster created with Terraform"
      + environment             = "PRODUCTION"
      + health                  = (known after apply)
      + id                      = (known after apply)
      + labels                  = {
          + "env" = "dev"
        }
      + name                    = (known after apply)
      + status                  = (known after apply)
      + version                 = "5.7"

      + access {
          + data_lens = false
          + web_sql   = true
        }

      + backup_window_start {
          + hours   = 1
          + minutes = 0
        }

      + host {
          + assign_public_ip = false
          + fqdn             = (known after apply)
          + subnet_id        = (known after apply)
          + zone             = "ru-central1-a"
        }
      + host {
          + assign_public_ip = false
          + fqdn             = (known after apply)
          + subnet_id        = (known after apply)
          + zone             = "ru-central1-b"
        }
      + host {
          + assign_public_ip = false
          + fqdn             = (known after apply)
          + subnet_id        = (known after apply)
          + zone             = "ru-central1-c"
        }

Maintenant, je veux mettre en place une sortie qui obtient des données à partir de dynamique host sous forme de carte comme host.zone = host.fqdn comme :

{ru-central1-a = "fqdn-a"
ru-central1-b = "fqdn-b"
ru-central1-c = "fqdn-c"}

J'ai essayé d'exécuter boucle for sur toute la ressource en prenant host.zone et host.fqdn mais cela ne semble pas fonctionner.... Toute aide est appréciée !